CN205422838U - Become turbine how much with wavy leading edge sunk structure of moving vane - Google Patents
Become turbine how much with wavy leading edge sunk structure of moving vane Download PDFInfo
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- CN205422838U CN205422838U CN201620159902.4U CN201620159902U CN205422838U CN 205422838 U CN205422838 U CN 205422838U CN 201620159902 U CN201620159902 U CN 201620159902U CN 205422838 U CN205422838 U CN 205422838U
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- leading edge
- moving vane
- sunk structure
- wheel hub
- blade
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Abstract
The utility model provides a become turbine how much with wavy leading edge sunk structure of moving vane, including quick -witted casket, wheel hub, evenly install adjustable stator blade and moving vane along the circumferencial direction between quick -witted casket and wheel hub, the adjustable stator blade in the front, the moving vane is in the back, on the adjustable stator blade, the terminal surface sets up respectively down, lower rotation axis, its axle center is on same rotation axis, and the diameter of axle is different, it is embedded into in the quick -witted casket to go up the rotation axis, the rotation axis is embedded into in the wheel hub down, move rooting -in of blades on wheel hub, move the wavy sunk structure that is that the blade leading edge position set up edge blade height direction interval arrangement. The utility model discloses can reduce or even eliminate the anterior separation eddy of blade under the especially low operating mode of off -design behaviour to obviously reduce pneumatic loss in the moving vane passageway, it also has and improves slightly to design performance under the operating mode in addition, on the whole the utility model discloses an it has good full condition characteristic to become how much turbines.
Description
Technical field
This utility model relates to a kind of variable geometry turbine, particularly relates to a kind of variable geometry turbine with moving vane wavy leading edge sunk structure.
Background technology
Gas turbine often works under off-design behaviour, and now turbine efficiency can be greatly lowered.The coupling that variable geometry turbine technology can effectively regulate and optimize between gas turbine components, improves acceleration and deceleration characteristic and the low-load performance of gas turbine.The setting angle of regulation Turbomachinery is then a kind of effective change method of geometry.
The variable geometry turbine of prior art, when low operating mode, turns down variable stator vane angle and reduces working medium flow and output, and variable stator vane angle downstream movable vane tends to run under bigger positive incidence, and cause separated flow on front side of movable vane suction surface；Starting and accelerating mode, opening big variable stator vane angle to increase gas turbine blower surge margin and gas generator dump power, and downstream movable vane tends to run under bigger negative angle of attack, causes movable vane pressure face serious separated flow occur.Showing according to the study, variable stator vane angle turns down the movable vane suction surface three-dimensional separation eddy field caused and the efficiency causing variable geometry turbine is more significantly declined, and the amplitude declined is up to 5%.
The adverse effect brought to reduce the variable geometry turbine big angle of attack of movable vane leading edge to flow, domestic and international research worker proposes variable geometry turbine movable vane to use the pneumatic design principle of bigger negative angle of attack, and then instructs moving vane blade design；But, so far, yet there are no and can effectively reduce the flowing of the variable geometry turbine moving vane leading edge big angle of attack and bring the relevant report of adverse effect.
Summary of the invention
The purpose of this utility model is that offer can reduce the separation eddy even eliminating bucket front under the lowest operating mode of off-design behaviour, thus moving vane passage in aerodynamic loss is obviously reduced, and under design conditions, performance also has a kind of variable geometry turbine with moving vane wavy leading edge sunk structure slightly improved.
The purpose of this utility model is achieved in that and includes casing, stator blade wheel hub and movable vane wheel hub, movable vane wheel hub is arranged on by stator blade wheel hub, between casing and stator blade wheel hub and adjustable stator blade is the most uniformly installed, between casing and movable vane wheel hub and moving vane is the most uniformly installed, the upper surface of adjustable stator blade and lower surface are respectively provided with rotary shaft and Shaft, upper rotary shaft is embedded in casing, Shaft is embedded in stator blade wheel hub, moving vane is arranged on movable vane wheel hub, wheel hub rotary shaft it is equipped with in movable vane wheel hub, arrange spaced in wavy sunk structure along blade height direction at moving vane leading edge locus.
This utility model also includes so some architectural features:
1. wavelength is blade chord length 10%～the 30% of the wavy leading edge sunk structure of moving vane described in, and wave amplitude is blade inlet edge diameter 1～4 times of wavy leading edge sunk structure.
2. the wavy leading edge sunk structure of moving vane described in equally arranges along blade height direction or along wheel hub to casing direction in gradually dredging shape arrangement.
3. the wavy leading edge sunk structure of moving vane described in uses round-corner transition with the intersection of blade surface.
4. described in, upper rotary shaft and the axis of Shaft are respectively positioned on same straight line with the rotation axis of adjustable stator blade, and the diameter of axle of upper rotary shaft is more than the diameter of axle of Shaft.
Compared with prior art, the beneficial effects of the utility model are: this utility model is inspired by Marine Biologists' research work in terms of humpback flipper morphology, arrange in wavy sunk structure at variable geometry turbine moving vane leading edge locus.Owing to wavy leading edge sunk structure can induce what manifold turned in pairs to flow to whirlpool, when variable stator vane angle rotates, the large incidence separation flow interaction that whirlpool can occur is flowed to moving vane front portion to turn, counteract the part vortex structures in separated flow, improved the momentum of bucket front fluid simultaneously by momentum-transport, thus improve the resistant to separation ability of moving vane.
Under design conditions, what wavy leading edge sunk structure induced flow to whirlpool also can interfere with petiolarea Passage Vortex, thus weaken the intensity of petiolarea Passage Vortex, and reduce petiolarea loss, although the loss of moving vane main flow area increased, but the loss in moving vane passage has and slightly reduces generally.Generally, this utility model has good full working scope operating characteristic.
Additionally, this utility model need not increase extra accessory structure, structure is relatively easy, it is easy to accomplish.
Accompanying drawing explanation
Fig. 1 is the meridian view of the variable geometry turbine with moving vane wavy leading edge sunk structure；
Fig. 2 is the variable geometry turbine moving vane structural representation with wavy leading edge sunk structure；
Fig. 3 is the partial view of wavy leading edge sunk structure；
Fig. 4 is the A-A profile in Fig. 1.
In figure: L is the wavelength of wavy leading edge sunk structure, W is the wave amplitude of wavy leading edge sunk structure.
Detailed description of the invention
With detailed description of the invention, this utility model is described in further detail below in conjunction with the accompanying drawings.
In conjunction with Fig. 1～2, this utility model is by wheel hub 1 (including stator blade wheel hub and movable vane wheel hub), adjustable stator blade 3, moving vane 4 and casing 6 form, adjustable stator blade 3 and moving vane 4 are the most uniformly installed between wheel hub 1 and casing 6, adjustable stator blade 3 is front, moving vane 4 is rear, adjustable stator blade upper, lower surface is respectively provided with rotary shaft 5, Shaft 2, its axle center on same rotation axis so that variable stator vane angle rotate, and the diameter of axle of upper rotary shaft is more than Shaft, Shaft only plays the role of positioning, upper rotary shaft is embedded in casing 6, Shaft is embedded in wheel hub 1, moving vane 4 is arranged on wheel hub 1, two ends, moving vane left and right are respectively leading edge 7 and trailing edge 8, arrange spaced in wavy sunk structure 9 along blade height direction in moving vane leading edge 7.
In conjunction with Fig. 3～4, manufacture the variable geometry turbine with moving vane wavy leading edge sunk structure of the present utility model, variable geometry turbine adjustable stator blade and moving vane is designed initially with traditional design method, then for given variable geometry turbine moving vane concrete structure and the situation such as aerodynamic parameter and operating condition scope, design wave shape leading edge sunk structure.
Concrete design procedure is as follows:
(1) flow range of angles of attack and blade construction and aerodynamic parameter situation according to variable geometry turbine moving vane, determine the wavelength in wavy sunk structure and wave amplitude；
(2) according to mobility status and actual demand in variable geometry turbine moving vane passage, determine that the exhibition of moving vane wavy leading edge sunk structure is to arrangement mode.
Should be noted, if the wavelength of described moving vane wavy leading edge sunk structure is relatively big, more weak to the control effect of separated flow, if wavelength is less, sunk structure increases, the loss himself brought also can be relatively big, the beneficial effect that this partial offset sunk structure brings.For the wave amplitude of wavy leading edge sunk structure, if too big, the performance of blade self damaged relatively big, whereas if if the least, induced is the least to the intensity in whirlpool to turn of tidal stream, controls effect the most weak.Therefore, wavelength is blade chord length 10%～the 30% of described moving vane wavy leading edge sunk structure, and wave amplitude is blade inlet edge diameter 1～4 times of wavy leading edge sunk structure.
Additionally, in view of variable geometry turbine under design conditions in moving vane passage separation eddy be Three-dimensional Flow characteristic, and produce and along exhibition to development from wheel hub end wall, the most described moving vane wavy leading edge sunk structure equally arranges along blade height direction, or along wheel hub to casing direction in gradually dredging shape arrangement.
In view of the flowing requirement to hydraulically smooth surface in processing and moving vane passage, described moving vane wavy leading edge sunk structure uses round-corner transition with the intersection of blade surface.
A kind of variable geometry turbine with moving vane wavy leading edge sunk structure, including casing, wheel hub, adjustable stator blade and moving vane are the most uniformly installed between casing and wheel hub, adjustable stator blade is front, moving vane is rear, adjustable stator blade upper, lower surface is respectively provided with, Shaft, its axle center is on same rotation axis, and the diameter of axle is different, upper rotary shaft is embedded in casing, Shaft is embedded in wheel hub, movable vane wheel hub is arranged on by stator blade wheel hub, moving vane is arranged on movable vane wheel hub, wheel hub rotary shaft it is equipped with in movable vane wheel hub, it is characterized in that: arrange spaced in wavy sunk structure along blade height direction at moving vane leading edge locus.
This utility model can also include:
1, wave amplitude is blade inlet edge diameter 1～4 times of wavelength is blade chord length 10%～the 30% of described moving vane wavy leading edge sunk structure, and wavy leading edge sunk structure.
2, described moving vane wavy leading edge sunk structure equally arranges along blade height direction, or along wheel hub to casing direction in gradually dredging shape arrangement.
3, described moving vane wavy leading edge sunk structure uses round-corner transition with the intersection of blade surface.
The purpose of this utility model is to provide a kind of variable geometry turbine with moving vane wavy leading edge sunk structure, including casing, wheel hub, adjustable stator blade and moving vane are the most uniformly installed between casing and wheel hub, adjustable stator blade is front, moving vane is rear, adjustable stator blade upper, lower surface is respectively provided with, Shaft, its axle center is on same rotation axis, and the diameter of axle is different, upper rotary shaft is embedded in casing, Shaft is embedded in wheel hub, moving vane is arranged on wheel hub, arrange spaced in wavy sunk structure along blade height direction at moving vane leading edge locus.The variable geometry turbine with moving vane wavy leading edge sunk structure of this utility model design can reduce the separation eddy even eliminating bucket front under the lowest operating mode of off-design behaviour, thus moving vane passage in aerodynamic loss is obviously reduced, and the performance under design conditions also has and slightly improves, the variable geometry turbine of this utility model design has good whole working condition property on the whole.
Claims (9)
1. the variable geometry turbine with moving vane wavy leading edge sunk structure, including casing, stator blade wheel hub and movable vane wheel hub, movable vane wheel hub is arranged on by stator blade wheel hub, between casing and stator blade wheel hub and adjustable stator blade is the most uniformly installed, between casing and movable vane wheel hub and moving vane is the most uniformly installed, the upper surface of adjustable stator blade and lower surface are respectively provided with rotary shaft and Shaft, upper rotary shaft is embedded in casing, Shaft is embedded in stator blade wheel hub, moving vane is arranged on movable vane wheel hub, wheel hub rotary shaft it is equipped with in movable vane wheel hub, it is characterized in that: arrange spaced in wavy sunk structure along blade height direction at moving vane leading edge locus.
A kind of variable geometry turbine with moving vane wavy leading edge sunk structure the most according to claim 1, it is characterized in that: wavelength is blade chord length 10%～the 30% of described moving vane wavy leading edge sunk structure, and wave amplitude is blade inlet edge diameter 1～4 times of wavy leading edge sunk structure.
A kind of variable geometry turbine with moving vane wavy leading edge sunk structure the most according to claim 1 and 2, is characterized in that: described moving vane wavy leading edge sunk structure equally arranges along blade height direction or along wheel hub to casing direction in gradually dredging shape arrangement.
A kind of variable geometry turbine with moving vane wavy leading edge sunk structure the most according to claim 1 and 2, is characterized in that: described moving vane wavy leading edge sunk structure uses round-corner transition with the intersection of blade surface.
A kind of variable geometry turbine with moving vane wavy leading edge sunk structure the most according to claim 3, is characterized in that: described moving vane wavy leading edge sunk structure uses round-corner transition with the intersection of blade surface.
A kind of variable geometry turbine with moving vane wavy leading edge sunk structure the most according to claim 1 and 2, it is characterized in that: described upper rotary shaft and the axis of Shaft are respectively positioned on same straight line with the rotation axis of adjustable stator blade, and the diameter of axle of upper rotary shaft is more than the diameter of axle of Shaft.
A kind of variable geometry turbine with moving vane wavy leading edge sunk structure the most according to claim 3, it is characterized in that: described upper rotary shaft and the axis of Shaft are respectively positioned on same straight line with the rotation axis of adjustable stator blade, and the diameter of axle of upper rotary shaft is more than the diameter of axle of Shaft.
A kind of variable geometry turbine with moving vane wavy leading edge sunk structure the most according to claim 4, it is characterized in that: described upper rotary shaft and the axis of Shaft are respectively positioned on same straight line with the rotation axis of adjustable stator blade, and the diameter of axle of upper rotary shaft is more than the diameter of axle of Shaft.
A kind of variable geometry turbine with moving vane wavy leading edge sunk structure the most according to claim 5, it is characterized in that: described upper rotary shaft and the axis of Shaft are respectively positioned on same straight line with the rotation axis of adjustable stator blade, and the diameter of axle of upper rotary shaft is more than the diameter of axle of Shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620159902.4U CN205422838U (en) | 2016-03-03 | 2016-03-03 | Become turbine how much with wavy leading edge sunk structure of moving vane |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620159902.4U CN205422838U (en) | 2016-03-03 | 2016-03-03 | Become turbine how much with wavy leading edge sunk structure of moving vane |
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| CN205422838U true CN205422838U (en) | 2016-08-03 |
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|---|---|---|---|
| CN201620159902.4U Expired - Fee Related CN205422838U (en) | 2016-03-03 | 2016-03-03 | Become turbine how much with wavy leading edge sunk structure of moving vane |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105626159A (en) * | 2016-03-03 | 2016-06-01 | 哈尔滨工程大学 | Variable geometry turbine with wavy concaved structures on front edges of movable blades |
| CN106741779A (en) * | 2016-12-21 | 2017-05-31 | 哈尔滨工程大学 | A kind of bionic nacelle propeller |
| CN111305906A (en) * | 2020-03-31 | 2020-06-19 | 哈尔滨工程大学 | Area is disconnected straight rib and is half split joint cooling structure between suitable for high temperature turbine blade |
-
2016
- 2016-03-03 CN CN201620159902.4U patent/CN205422838U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105626159A (en) * | 2016-03-03 | 2016-06-01 | 哈尔滨工程大学 | Variable geometry turbine with wavy concaved structures on front edges of movable blades |
| CN106741779A (en) * | 2016-12-21 | 2017-05-31 | 哈尔滨工程大学 | A kind of bionic nacelle propeller |
| CN111305906A (en) * | 2020-03-31 | 2020-06-19 | 哈尔滨工程大学 | Area is disconnected straight rib and is half split joint cooling structure between suitable for high temperature turbine blade |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160803 |
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| CF01 | Termination of patent right due to non-payment of annual fee |